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## Is there NaN in Java?

In Java, “NaN” stands for “**not a number”** and signifies that a value is not defined. “NaN” is not an exception error, but a value that is assigned. For example, imaginary numbers like the square root of negative numbers or zero divided by zero will both print “NaN” as the result. Take a look at the example below.

## Is NaN real?

NaN is special in that **it doesn’t have a real value**, so comparing it to itself doesn’t return true. Essentially, NaN is equal to nothing, not even NaN . The only way to reliably compare something to NaN is using isNaN( value ) .

## Why does NaN occur?

“Why does **NaN exist at all**, rather than resulting in an exception or error?” Because it is neither an exception nor an error. It is a perfectly valid result for a calculation. You have several use cases in mathematics where you are receiving the equivalent to “NaN”, i.e., something that cannot be measured.

## When NaN is used?

In mathematics, **zero divided by zero is undefined as a real number**, and is therefore represented by NaN in computing systems. The square root of a negative number is not a real number, and is therefore also represented by NaN in compliant computing systems.

## Is NaN null in Java?

NaN means “**Not a Number**” and is the result of undefined operations on floating point numbers like for example dividing zero by zero. (Note that while dividing a non-zero number by zero is also usually undefined in mathematics, it does not result in NaN but in positive or negative infinity).

## How do you prevent NaN?

**Here are 4 methods to avoid NaN values.**

- Avoid #1: Mathematical operations with non-numeric string values. …
- Avoid #2: Mathematical operations with functions. …
- Avoid #3: Mathematical operations with objects. …
- Avoid #4: Mathematical operations with falsy values. …
- Conclusion.

## Why does NaN float?

NaN stands for Not A Number and is one of the common ways to represent the missing value in the data. It is a **special floating-point value and cannot be converted to any other type than float**.

## Why NaN is a Number?

By definition, NaN is **the return value from operations which have an undefined numerical result**. Hence why, in JavaScript, aside from being part of the global object, it is also part of the Number object: Number. NaN. It is still a numeric data type , but it is undefined as a real number .

## What does NaN mean in slang?

Wes “Nan” is the equivalent of saying **none, nothing, or nobody** depending on how it is used.

## How do you know if a value is NaN?

The **Number.** **isNaN() method** determines whether a value is NaN (Not-A-Number). This method returns true if the value is of the type Number, and equates to NaN. Otherwise it returns false.

## Is NaN in Python?

The math. isnan() method checks whether a value is NaN (**Not a Number**), or not. This method returns True if the specified value is a NaN, otherwise it returns False.

## What should I replace NaN with?

KNN and MICE imputations use **the whole dataset** to replace the NaN value, while median and mean uses only the column of the missing value, that’s why the last 2 algorithms don’t affect strongly the dataset structure and don’t change its information.